Insect Shield’s Nylon Baseball Cap in infused with the active ingredient Permethrin, a man-made form of a natural insect repellent. This repellent provides protection against biting insects such as mosquitoes, ticks, flies and chiggers. Insect Shield products are EPA-registered and offer convenient, comfortable and long-lasting insect protection—even after 70 washes. This insect hat creates a barrier while you work, reducing the need for messy sprays and oily repellents. Mesh side panels help keep you cooler in hot working conditions. Moisture-absorbing headband keeps the sweat out of your eyes. Reflective trim for greater visibility at night. Adjustable fabric backstrap. Imported.